David's Astronomy Pages
Notes - Session 1173 (2023-12-16)

 
Bullet Session Aims & Highlights
 - Observing Result
 - Night Summary Plot
 - Session Event Log
Bullet Operational Issues
  - Critical Issues (0),  Major Issues (0),  Minor Issues (3),  Small Defects (6),  Continuous Improvement (9)
   
Bullet Images from 2023-12-16 >>         
Bullet Investigation - LX200 continued tracking even though tracking had been turned off
   

Session Aims & Highlights (2023-12-16)

Main aims

  1. Observatory Software. Check overall stability in Observatory Software following updates to AstroMain, AstroPlan and AstroAllSky since previous session, 11 days ago
  2. Targets.  Acquire images of a selection of variable stars, nearby stars, comets & deep sky targets as allowed by sky conditions.
  3. Dome Slewing.  Check out Dome Slewing since introduction of DomeLink driver that sits between DeviceHub and Pulsar Observatories Dome Drive.
  4. FindPark.  Try out new FindPark routine in a Live Session under automated control (this will be tried during Finishing State right at the end of the Session)
  5. 12P/Pons-Brooks. Acquire images of Comet 12P/Pons-Brooks which has been undergoing an outburst.

 Equipment & Software

Highlights

NotesNotes:

Summary Plots & Logs

Observing Plan
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Observing Result
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Dome & Scope Slewing Performance
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Slew/Centering Performance
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Guiding Performance
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Sky Conditions (Locate Frames)
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Night Sky Summary Plot
Top axis: Sky Brightness at Zenith (in ADU/s)
Lefthand axis: Local Time (hh LT). Righthand axis: Sun Altitude (degs)
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Actual Weather vs Pre-Session Weather Forecast
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Session Event Log
Time     Event Detail
17:03:19 Session Monitoring AutoStart monitoring for Live Session opportunity between 17:03 & 06:22
17:03:20 Session AutoStarting Session autostarting (17:03)
17:03:29   CCDSoft Restarting CCDSoft being restarted (to set AutoSave No.)
17:03:54   Camera1 Connected SBIG Camera connected (Set point -30°C)
17:03:56 Session Created Session Created (Live, 2023-12-16 S01173, ImageSaveNum: 1173001)
17:04:01   Scope Switched On Telescope Power has been switched on via UPB Powerbox.
17:05:47   Services Started Observatory Services started
17:05:53 Observatory (Auto) Observatory placed in Fully-Automated Mode
17:05:56 Session Pending Session pending (2023-12-16)
17:05:58 Session Initiating Session initiating (2023-12-16)
17:06:00   Plan Requested Observing Plan requested from AstroPlan (1.39.4)
17:07:16   Plan Loaded Observing Plan loaded to queue (Plan ID: 947)
17:07:31   Camera1 Connected SBIG Camera connected (Set point -10°C)
17:08:06   Telescope Connected Telescope connected (TheSky6)
17:08:30 Session Equilibration Session ready to Open Dome
17:09:15   Dome Opened Dome opened (opening time 45s)
17:09:18 Session Running Session running
17:09:20   Queue Started Observing Queue started (44 targets selected)
17:09:21     Target Started (NrZen) Target started (Focus Field 0, HIP 106)
17:09:35       Dome Unparked Dome unparked
17:12:20       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
17:14:56       Focusing Completed Foc1 AutoFocus Completed (Profile No 1, wide)
17:16:52       Focusing Completed Foc1 AutoFocus Completed (Profile No 1)
17:17:18       Focusing Started-Foc2 Foc2 Focusing Started (Secondary Scope, using ShCap)
17:19:01       Focusing Completed Foc2 AutoFocus Completed (Profile No 2, wide)
17:20:44       Focusing Completed Foc2 AutoFocus Completed (Profile No 2)
17:21:01     Target Completed (NrZen) Target completed (Focus Field 0, HIP 106)
17:22:26     Target Started (1/44) Target started (1/44, M31 w/Nova M31 AT2023yij)
17:25:26       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
17:27:53       Focusing Completed Foc1 AutoFocus Completed (Profile No 3)
17:37:26   Observatory Door Observatory Door has opened
17:39:56   Observatory Door Observatory Door has closed (open time 2.5 min)
17:43:42     Target Completed Target completed (1/44, M31 w/Nova M31 AT2023yij)
17:44:46     Target Started (2/44) Target started (2/44, AT2023cz (CV))
17:47:12   Observatory Door Observatory Door has opened
17:47:18   Observatory Door Observatory Door has closed (open time 6s)
17:50:10       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
17:52:18       Focusing Completed Foc1 AutoFocus Completed (Profile No 4)
17:52:44   Observatory Door Observatory Door has opened
17:52:50   Observatory Door Observatory Door has closed (open time 6s)
17:58:22     Target Completed Target completed (2/44, AT2023cz (CV))
17:58:26     Target Started (3/44) Target started (3/44, M31 w/Nova M31 AT2023yqt)
18:00:58       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
18:17:01     Target Completed Target completed (3/44, M31 w/Nova M31 AT2023yqt)
18:19:26     Target Started (4/44) Target started (4/44, UGC 831 w/AT2023wdd)
18:21:57       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
18:24:09   Critical Cloud Alert Critical Cloud Alert (Obs.Manager will close the Dome)
18:24:11   HardSuspend Called Hard Suspend is called due to Critical Conditions (cloud)
18:24:14     Target Aborted (4/44) Target aborted (4/44, UGC 831 w/AT2023wdd) due to cloud
18:24:16   Queue Paused Queue paused for Session Suspension
18:24:18 Session Suspending Session suspending
18:25:45   Dome Closed Dome closed (closing time 90s)
18:25:47 Session Suspended Session suspended
18:31:35 Session Resuming Session resuming
18:32:30   Dome Opened Dome opened (opening time 55s)
18:32:33 Session Running Session running
18:32:35   Queue Resumed Observing Queue resumed
18:32:37     Target Started (4/44) Target started (4/44, UGC 831 w/AT2023wdd)
18:35:16       SoftSuspend Called Soft Suspend is called due to Deteriorating Conditions (reducing clarity)
18:36:41   Critical Cloud Alert Critical Cloud Alert (Obs.Manager will close the Dome)
18:36:43   HardSuspend Called Hard Suspend is called due to Critical Conditions (cloud)
18:36:45     Target Aborted (4/44) Target aborted (4/44, UGC 831 w/AT2023wdd) due to cloud
18:36:47   Queue Paused Queue paused for Session Suspension
18:36:49 Session Suspending Session suspending
18:37:31   Dome Closed Dome closed (closing time 45s)
18:37:33 Session Suspended Session suspended
18:38:22     Target Cancelled Target cancelled (4/44, UGC 831 w/AT2023wdd) due to cloud
18:50:33 Session Resuming Session resuming
18:51:18   Dome Opened Dome opened (opening time 45s)
18:51:20 Session Running Session running
18:51:22   Queue Resumed Observing Queue resumed
18:51:24     Target Started (5/44) Target started (5/44, C/2021 O3 (PANSTARRS))
19:03:47     Target Completed Target partially completed (5/44, C/2021 O3 (PANSTARRS))
19:03:51     Target Started (6/44) Target started (6/44, AT2022epv (CV))
19:06:42       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
19:08:31       Focusing Completed Foc1 AutoFocus Completed (Profile No 5)
19:14:19     Target Completed Target completed (6/44, AT2022epv (CV))
19:14:24     Target Started (7/44) Target started (7/44, 12P/Pons-Brooks)
19:17:42       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
19:29:35     Target Completed Target completed (7/44, 12P/Pons-Brooks)
19:29:50     Target Started (8/44) Target started (8/44, AT2023tvi (CV))
19:32:55       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
19:35:07       Focusing Completed Foc1 AutoFocus Completed (Profile No 6)
19:40:55     Target Completed Target completed (8/44, AT2023tvi (CV))
19:41:50     Target Started (9/44) Target started (9/44, GCVS CY Lyr)
19:46:03       Focusing Skipped Foc1 focusing skipped - star is lost (TCF-S)
19:50:17     Target Completed Target completed (9/44, GCVS CY Lyr)
19:52:08     Target Started (10/44) Target started (10/44, AT2023qou (CV))
19:55:29       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
19:57:29       Focusing Completed Foc1 AutoFocus Completed (Profile No 7)
20:03:17     Target Completed Target completed (10/44, AT2023qou (CV))
20:04:08     Target Started (11/44) Target started (11/44, NGC 3690 w/SN2023wrk)
20:06:47   Critical Cloud Alert Critical Cloud Alert (Obs.Manager will close the Dome)
20:06:49   HardSuspend Called Hard Suspend is called due to Critical Conditions (cloud)
20:06:51     Target Aborted (11/44) Target aborted (11/44, NGC 3690 w/SN2023wrk) due to cloud
20:06:53   Queue Paused Queue paused for Session Suspension
20:06:55 Session Suspending Session suspending
20:07:47   Dome Closed Dome closed (closing time 55s)
20:07:50 Session Suspended Session suspended
20:23:24     Target Cancelled Target cancelled (11/44, NGC 3690 w/SN2023wrk) due to cloud
20:23:49 Session Resuming Session resuming
20:25:30 Session Suspended Session suspended
20:26:15   Dome Closed Dome closed (closing time 45s)
20:28:00 Session Resuming Session resuming
20:28:45   Dome Opened Dome opened (opening time 45s)
20:28:47 Session Running Session running
20:28:49   Queue Resumed Observing Queue resumed
20:28:51     Target Started (12/44) Target started (12/44, AT2022trk (CV))
20:31:45       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
20:33:42       Focusing Completed Foc1 AutoFocus Completed (Profile No 8)
20:40:30     Target Completed Target completed (12/44, AT2022trk (CV))
20:40:34     Target Started (13/44) Target started (13/44, AT2023tjz)
20:43:23       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
20:59:20     Target Completed Target completed (13/44, AT2023tjz)
21:00:50     Target Started (14/44) Target started (14/44, 29P/Schwassmann-Wachmann)
21:04:06       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
21:06:35       Focusing Completed Foc1 AutoFocus Completed (Profile No 9)
21:13:56       SoftSuspend Called Soft Suspend is called due to Deteriorating Conditions (too few stars)
21:17:36   Critical Cloud Alert Critical Cloud Alert (Obs.Manager will close the Dome)
21:17:38   HardSuspend Called Hard Suspend is called due to Critical Conditions (cloud)
21:17:41     Target Aborted (14/44) Target aborted (14/44, 29P/Schwassmann-Wachmann) due to cloud
21:17:43   Queue Paused Queue paused for Session Suspension
21:17:45 Session Suspending Session suspending
21:18:31   Dome Closed Dome closed (closing time 50s)
21:18:34 Session Suspended Session suspended
21:38:42     Target Cancelled Target cancelled (15/44, AT2023wue) due to cloud
21:58:20     Target Cancelled Target cancelled (16/44, Nova Cas 2021) due to cloud
22:00:19       Dome Unparked Dome unparked
22:18:50     Target Cancelled Target cancelled (17/44, AT2023yyz) due to cloud
22:30:12     Target Cancelled Target cancelled (18/44, GCVS HH And) due to cloud
22:49:17     Target Cancelled Target cancelled (19/44, UGC 4582 w/SN2023twg) due to cloud
23:11:37     Target Cancelled Target cancelled (20/44, AT2023twu) due to cloud
23:23:55     Target Cancelled Target cancelled (21/44, GCVS BL Lac) due to cloud
23:36:15     Target Cancelled Target cancelled (22/44, AT2022whd (CV)) due to cloud
23:54:30 User Intervention User request to close and finish session
23:54:33   Queue Aborted Job Queue aborted
23:54:35 Session Closing Session closing
23:54:40   Dome Closed Dome already closed (closed at 21:18, closing time 50s, zigbee 42s)
23:55:04   Dome Parked Dome parked (parking time 15s), Az: 90.0 deg
23:56:17   Telescope Parked Telescope parked (parking time 69s)
23:56:31   Telescope State Handbox reads 'Scope parked Turn scope off.'
23:56:54   Telescope Switched Off Telescope Power has been switched off via UPB Switch.
23:58:16   Dome Charging Dome is parked and re-charging ok
23:58:18   Services Stopped Night Services stopped
23:58:21 Session Finishing Session Finishing started (Create Fits Summary, Transfer Files)
23:58:37     Dome (Find Park) Find Park started (Search Az 86.0 to 94.0°, Step 0.5°)
23:59:32     Dome Find Park found (Best Park Az 90.0°)
23:59:38     Dome Find Park completed (Dome at Az: 90.0°)
23:59:41 Session Finished Session Finished

 
Session Alerts & Alarms
Time     Type       Name Detail
17:05:54 Yellow Alert Disk Space Free Space on C:\ Drive (33.38 GB) is less than 50 GB
23:58:32 Yellow Alert Disk Space Free Space on C:\ Drive (31.84 GB) is less than 50 GB
 

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Operational Issues (2023-12-16, S1173)

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Critical Issues

Major Issues

Minor Issues

Small Defects

Continuous Improvement

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Fig 1a.   Focus Chart from S1173 Session showing anomalous result from Focus Profile 9.

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Fig 1b.   Focus Profile 9
Profile somehow passed QC checks when it it should have been dismissed and not used.

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Fig 2. Cam1 (SBIG) Camera Angle . Camera Angle up to 180.4° instead of ideal angle (180.0°)
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Investigation - LX200 continued tracking even though tracking had been turned off

Issue
Telescope continued tracking after 21:33 even though a Turn-Off Tracking operation took place.

Description
Whilst investigating why a 'Dome Unparked' event was unexpectedly recorded at 22:00:19. it was determined that this was because the dome was incrementally moving in response to Slaving Calculations and commands from DeviceHub, and this was due to the telescope continuing to track after 21:33 when it was thought that the Tracking was turned off at a time point 15 minutes into a session suspension which had begun at 21:18.

ObsPics show a Telescope Status to change from Tracking to Stationary at 21:33 and Report File records a 'Turn Off Tracking' operation at a point somewhere between 21:24 and 21:38, which the log file records as being made at 21:33:33.6.

Earlier in the session there were Turn Off Tracking operations at 17:08:26 (directly after connecting to telescope at start of session) and at 20:22:50.02 (15 mins into an earlier Session Suspension).   These operations were both successful in changng the telescope from tracking to stationary.

Analysis
The Meade Generic log show that in response to  a "Tracking Set      False"  command at 21:33:33.6  the Tracking state changes from True (21:33:32.12) to False (21:33:34.89) and GetScopeAlignmentStatus (PTP) changes from "AlignmentMode=algPolar;Tracking=True;Status=ScopeWasParked" (21:33:32.127) to "AlignmentMode=algPolar;Tracking=False;Status=ScopeWasParked" (21:33:34.8). 

So it seems the Telescope Driver is sent the message to Stop Tracking and seemingly changes state but physically the scope continues moving ? 

At 21:34 the log indicates Azimuth 83.5794444444444, but by 21:55 Azimuth all whilst Tracking was supposedly False,   In the same time RightAscension went from 08:41:47  to 08:42:34.  Azimuth should have been constant if tracking was off, but equally if Tracking was on Azimuth should have been constant ?  Could PHD2 have been moving the scope .  It doesn't seem so,  the last PulseGuide command was made at 21:08:22 during the final frame of Target 14/44 (29P/Schwassmann-Wachmann) before session was suspended because of cloud. 

Issue can't be associated with the TeleLink intermediary driver as that sits between TheSky/TeleAPI and DeviceHub.Telescope, not between DeviceHub.Telescope and MeadeGeneric/LX200. 

AstroMain, DeviceHub and seemingly MeadeGeneric all seem to be doing what the reports indicates to be doing and it looks like the issue was a glitch in LX200 itself. 

Need to look at other cases to see if this was a one-off glitch or has always being happened ?  Looking at S1171 (2023-12-16) tracking was stopped by ObsManager in the same way, and worked as designed and stopped the Telescope from tracking. (Alt/Az position remained stationary). 

Conclusion

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